Helmert variance component estimation method for GPS+BDS and UWB integrated positioning

doi:10.13474/j.cnki.11-2246.2023.0238

Abstract

Abstract: In order to improve the positioning accuracy of indoor and outdoor transition areas, GPS/BDS and UWB integrated positioning is used to establish a integrated GPS/BDS and UWB positioning model, and for the different structures of GPS and BDS constellations, and the large difference between UWB and GNSS observation residuals, the Helmert variance component estimation method is used to determine GPS+BDS and UWB respectively. Finally, the accuracy is verified by the dynamic indoor and outdoor transition zone experimental integrated model, and the results show that based on the GNSS+UWB positioning system and the Helmert variance component method, the positioning accuracy in the north, east and zenith directions has been improved. The positioning accuracy can be improved by about 20% under static conditions and about 10% under dynamic conditions.

Key words: integrated positioning, Helmert variance component estimation, GPS, BDS, UWB

CLC Number:

P228

ZHAO Yiwen, YANG Tianran, MIAO Lili, MA Yuntao. Helmert variance component estimation method for GPS+BDS and UWB integrated positioning[J]. Bulletin of Surveying and Mapping, 2023, 0(8): 91-96.

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